Designing a 0D/2D S-Scheme Heterojunction over Polymeric Carbon Nitride for Visible-Light Photocatalytic Inactivation of Bacteria.
Pengfei XiaShaowen CaoBicheng ZhuMingjin LiuMiusi ShiJiaguo YuYufeng ZhangPublished in: Angewandte Chemie (International ed. in English) (2020)
Constructing heterojunctions between two semiconductors with matched band structure is an effective strategy to acquire high-efficiency photocatalysts. The S-scheme heterojunction system has shown great potential in facilitating separation and transfer of photogenerated carriers, as well as acquiring strong photoredox ability. Herein, a 0D/2D S-Scheme heterojunction material involving CeO2 quantum dots and polymeric carbon nitride (CeO2 /PCN) is designed and constructed by in situ wet chemistry with subsequent heat treatment. This S-scheme heterojunction material shows high-efficiency photocatalytic sterilization rate (88.1 %) towards Staphylococcus aureus (S. aureus) under visible-light irradiation (λ≥420 nm), which is 2.7 and 8.2 times that of pure CeO2 (32.2 %) and PCN (10.7 %), respectively. Strong evidence of S-scheme charge transfer path is verified by theoretical calculations, in situ irradiated X-ray photoelectron spectroscopy, and electron paramagnetic resonance.
Keyphrases
- visible light
- high efficiency
- staphylococcus aureus
- quantum dots
- drug delivery
- cancer therapy
- magnetic resonance imaging
- photodynamic therapy
- density functional theory
- molecular dynamics
- wastewater treatment
- radiation therapy
- heat stress
- escherichia coli
- computed tomography
- cystic fibrosis
- radiation induced
- electron transfer